[Crustacea • 2021] Cherax latimanus • A New Burrow-dwelling Freshwater Crayfish (Decapoda, Parastacidae) from the mid-Murray River catchment, Australia

 Cherax latimanus

McCormack & Raadik, 2021

  DOI: 10.11646/zootaxa.5026.3.2

Abstract

A new species of freshwater crayfish in the southern hemisphere family Parastacidae is described from the Murray Darling Basin (MDB), eastern Australia. The Swamp Yabby, Cherax latimanus sp. nov., is found in the mid-Murray River area of the states of New South Wales and Victoria and is only the third species of Cherax found naturally occurring in the MDB. It is morphologically distinguished from all other species of Cherax by the presence of marginal mesial dactylar basal spines and extensive ventral propodal setation. It is found in sympatry with the widespread but morphologically similar Common Yabby, Cherax destructor Clark, 1936, but can be distinguished by a suite of morphometric and meristic characters that include a broad rostrum lacking an apical spine, very broad chelae with deep punctations on the lateral propodal edge and ventral propodal setation, two prominent dactylar teeth, one mesial carpal spine, dorsal meral spines present, no setae on carpal mesial margin, cervical spines absent or tiny, and by genetic data. Cherax latimanus is further diagnosed by its distinctive biology: it is not found in permanent aquatic habitats such as streams or billabongs, spending the majority of its time in extensive, terrestrial, burrow networks containing some water, in ephemerally wet habitats such as drainage lines, roadside drains, depressions, swamps and cleared areas of pasture in lowland to foothill areas. It is occasionally found in stream habitats but only during large flood events when burrow systems are inundated.

Keywords: Crustacea, taxonomy, Crustacea Cherax destructor, yabby, yabbie, morphology, Barmah, wetland, Murray River, Murray-Darling Basin

  Cherax latimanus sp. nov., holotype, NMV J74790, male, 63.6 mm OCL,
roadside drain on south-east side of Nelson Road (near Benalla), Victoria

(Image: Rob McCormack).

Cherax latimanus sp. nov.

Swamp Yabby

Etymology. From the Latin latus, meaning broad, wide, and manus, meaning hand, in reference to its distinctive wide chelae, an obvious characteristic which separates it from the Common Yabby (Cherax destructor) with which it is broadly sympatrically found.

 Common name—Swamp Yabby, however, colloquially also referred to as Banjo Claw Yabby, Barmah Cray, Barmah Swamp Yabby, Broad Claw Yabby, Broad Palmed Yabby, Moon Claw Yabby, Mud Burrow Yabby, Spanner Yabby, Spanner Claw Cray, Spanner Claw Yabby, Swamp Cray, Swamp Yabby, or Swampies.

Robert B. McCormack and Tarmo A. Raadik. 2021. Cherax latimanus sp. nov., A New Burrow-dwelling Freshwater Crayfish (Decapoda, Parastacidae) from the mid-Murray River catchment, Australia. Zootaxa. 5026(3); 344-374. DOI: 10.11646/zootaxa.5026.3.2

 delwp.vic.gov.au/media-centre/media-releases/new-yabby-discovery-15-years-in-the-making

[Mollusca • 2021] Aenigmatoconcha eunetis • Systematic Revision of the Limestone Karst-restricted Land Snail Genus Aenigmatoconcha (Eupulmonata: Helicarionidae), with Description of A New Species

[F, G, H] Aenigmatoconcha eunetis Pholyotha & Panha  

in Pholyotha, Sutcharit, Tongkerd & Panha, 2021.

DOI: 10.5852/ejt.2021.767.1487 

facebook.com/BioChula

ABSTRACT

Thai limestone karsts are known to contain a rich biodiversity of animals, especially terrestrial snails, but still require further intensive exploration to evaluate their biodiversity. To date, only a few studies on the limestone karst-inhabiting land snail genera have been published. The present work focuses on the species diversity and phylogenetic relationships of the limestone karst-restricted land snail genus Aenigmatoconcha from Thailand, based on comparative morphology and molecular evidence. The results yielded three known species (A. clivicola Tumpeesuwan & Tumpeesuwan, 2017, A. sumonthai Tumpeesuwan & Tumpeesuwan, 2018, and A. mitis (Pfeiffer, 1863) comb. nov.), plus a new species (A. eunetis Pholyotha & Panha sp. nov.). The phylogenetic analyses of partial fragments of the mitochondrial cytochrome oxidase c subunit I (COI) gene confirmed the monophyly of all recognized species and congruence with the traditional morphology-based species designations. Average uncorrected p-distances of COI sequences between species were 9.7–12.0% and within species were 0.2–4.2%. This study also provides the re-description of penial sculpture, penial sheath, flagellum, penial caecum, and mantle lobe morphology that were neglected from the type species description. The present discovery of a new species increases the known diversity of Thai land snails and will support the conservation planning to protect karst biodiversity.

Keywords: Endemic, Indochina, limestones, COI gene, DNA barcoding

 Arthit Pholyotha, Chirasak Sutcharit, Piyoros Tongkerd and Somsak Panha. 2021. Systematic Revision of the Limestone Karst-restricted Land Snail Genus Aenigmatoconcha (Eupulmonata: Helicarionidae), with Description of A New Species. European Journal of Taxonomy. 767(1), 55-82. DOI: 10.5852/ejt.2021.767.1487

 facebook.com/BioChula/photos/3087163664897206

[Herpetology • 2021] Pristimantis achupalla • A New Minute Species of Direct-developing Frog (Anura, Strabomantidae) inhabiting Bromeliads of the Montane Forest of the Amazonian Andes of Puno, Peru

 Pristimantis achupalla  

Ttito​ & Catenazzi, 2021

 DOI: 10.7717/peerj.11878

Abstract 

We describe a new species of bromeliad-dwelling Pristimantis from primary montane forest (2,225 m a.s.l.) in southern Peru. The type locality is near Thiuni, in the Department of Puno (province of Carabaya) in the upper watershed of a tributary of the Inambari River. Pristimantis achupalla sp. n. is characterized by a snout-vent length of 10.0–12.8 mm in adult males (n = 4), unknown in adult females, and is compared morphologically and genetically with species in the Pristimantis lacrimosus group, and with other similar species of Pristimantis. The new species is characterized by having skin on dorsum and flanks rugose, green brownish color, distinctive scapular folds, subacuminate or acuminate snout profile, upper eyelid bearing two or three subconical tubercles and some rounded tubercles, rostral papilla, flanks light brown to brown, with irregular dark brown marks.

Figure 3: Holotype of  Pristimantis achupalla sp. n., male CORBIDI 18736 (SVL 12.8 mm).
 In dorsolateral view (A); dorsal (B) and ventral (C) views of specimen alive.

Photographs by A. Catenazzi.

Figure 6: Dorsolateral views of holotype and three paratypes of  Pristimantis achupalla sp. n. showing detail of coloration patterns and morphological feactures.
Male CORBIDI 18736 (A), SVL = 12.8 mm. Male CORBIDI 18737 (B), SVL = 11.7 mm.
Male MUBI 17604 (C), SVL = 10.0 mm. Juvenile MUBI 17605 (D), SVL = 10.4 mm

Photographs by A. Catenazzi.

Pristimantis achupalla sp. n.

Definition: The new species is distinguished by the following combination of characters: (1) skin on dorsum rugose, that on venter areolate, discoidal fold absent, dorsolateral folds absent; (2) tympanic membrane differentiated, tympanic annulus visible, slightly robust supratympanic fold covering dorsal and posterior edges of tympanum; (3) snout acuminate in dorsal view, truncated and posteroventrally inclined in lateral view, canthus rostralis weakly concave in dorsal view, angular in lateral view, loreal region concave, rostral papilla present; (4) upper eyelid bearing two or three subconical tubercles and some rounded tubercles, cranial crests absent, and postrical turbercles present; (5) dentigerous process of vomers absent; (6) males with vocal sacs and vocal slits, nuptial excrescences absent; (7) Fingers I and II of equal length, fingers II and III bearing rounded discs about 1.2 times wider than digits, Finger IV bearing a rounded disc about twice as wide as its digit; (8) fingers with narrow lateral fringes; (9) antebrachial tubercle present; (10) ulnar and tarsal tubercles present (11) inner metatarsal tubercle oval twice as long as round outer metatarsal tubercle, low supernumerary plantar tubercles at the base of toes I, II, and III; (12) toes with narrow lateral fringes, webbing absent, Toe V longer than Toe III; (13) in life, males with dorsum brownish green; canthal stripe brown extending to the orbits; dorsolateral stripe brown; throat and belly pale green; groins, posterior surfaces of thighs, and shanks bright pale green; iris bronze with fine black reticulations; (14) SVL in adult males 10–12.8 mm; SVL in females unknown. 

Etymology: The name of the new species is a Quechua noun, used in apposition, “achupalla” = bromeliads, in reference to the use of bromeliads as its microhabitats.

Conclusions: 

We describe a new species of terrestrial breeding frog in the genus Pristimantis. We justify the generic location-based on morphological similarity and phylogenetic analyses. The new species P. achupalla is nested within the P. lacrimosus group and is closely related to an undescribed species P. sp. from Peru, P. amagunae, P. sp. from Ecuador, and P. bromeliaceus. These species of minute, bromeliad-living frogs form a clade well supported in the phylogeny. Additionally, several meristic traits distinguish P. achupalla from similar species in P. lacrimosus group. We discuss the difficulty of justifying the position of P. achupalla within groups such as P. lacrimosus, but we also confirm the evolutionary unicity of P. achupalla which supports our taxonomic decision to describe it as new species. Our contribution increases the knowledge of the rich diversity of terrestrial breeding frogs found at high elevations on the eastern slopes of the Cordillera de Carabaya. 

  

Alex Ttito​ and Alessandro Catenazzi. 2021. Pristimantis achupalla sp. n., A New Minute Species of Direct-developing Frog (Amphibia, Anura, Strabomantidae) inhabiting Bromeliads of the Montane Forest of the Amazonian Andes of Puno, Peru. PeerJ. 9:e11878. DOI: 10.7717/peerj.11878

    

[Ichthyology • 2021] A Taxonomic Review of the Family Trachipteridae (Acanthomorpha: Lampridiformes), with An Emphasis on Taxa Distributed in the western Pacific Ocean

Zu sp. 

in Martin & Hilton, 2021. 

DOI: 10.11646/ZOOTAXA.5039.3.1

photographed in Nusa Penida, Indonesia by Helen Mitchell

Abstract

The family Trachipteridae—the Ribbonfishes, Dealfishes, and their relatives—has a circumglobal distribution, with at least 10 species in three genera (Zu Walters & Fitch 1960, Desmodema Walters & Fitch 1960, and Trachipterus Goüan 1770) that are characterized by elongate, extremely laterally compressed bodies, large eyes, absence of ribs, spines on lateral-line scales, greatly protrusible mouths, and a lack of pelvic fins in adults. They are also known for the drastic morphological changes that occur during ontogeny. Trachipterids are poorly represented in collections due to the fragile nature of their bodies. Most studies of the Trachipteridae have been limited by the numbers, developmental stages, and the completeness of the specimens that were examined. Along with the lack of available material, incomplete and conflicting character information compounds the taxonomic confusion of Trachipteridae. Despite the body of regional revisions that have examined trachipterid taxonomy, none have synthesized a suite of morphological characters across ontogeny. The goals of this paper are to (1) revise the family Trachipteridae, (2) revise the genera Trachipterus, Zu, and Desmodema, including information regarding ontogeny and biogeography, and 3) address the alpha taxonomy of Zu, Desmodema, and Trachipterus from the western Pacific Ocean. We recognize possibly five species of Trachipterus as being present in the western Pacific, as well as two species of both Zu and Desmodema. Despite additions to the specimen base that allows refinement of taxonomy and diagnoses, there are still large knowledge gaps associated with the taxonomic review of Trachipteridae. These reflect incomplete understanding of geographic distribution of taxa which may mask unrecognized taxonomic variability. The genus Trachipterus specifically remains problematic and will require greater detailed global study. Early life history stages remain unknown for several taxa which hinders full interpretation of ontogenetic transitions. Protracted transitions, some of which are clarified here, further confuse stage-based diagnoses and must be considered in future analyses of this family.

 

Keywords: Pisces, Ribbonfishes, Trachipterus, Desmodema, Zu, ontogenetic characters 

Order Lampridiformes Goodrich 1909

Family Trachipteridae Swainson 1839

Ribbonfishes, Dealfishes

Trachipterus Goüan 1770

Putatively valid taxa in the western Pacific Ocean 

1. Trachipterus trachypterus (Gmelin 1789). Holotype: No types known. Mediterranean. 

2. Trachipterus altivelis Kner 1859. Syntype: NMW 22046. Valparaiso, Chile. Unavailable for examination in current study.

3. Trachipterus arawatae Clarke 1881. Holotype NMNZ P.1008, 51 cm SL. Hominy Cove, Jackson’s Bay New Zealand. Examined.

4. Trachipterus jacksonensis (Ramsay 1881). Syntype: AMS A.9114, 1408 mm, caudal missing (736 mm SV). Manly Beach, Port Jackson, New South Wales, Australia. Examined.

5.  Trachipterus ishikawae Jordan & Snyder 1901. Holotype: NSMT 589, 1250 mm SL. Off the mouth of Tokyo Bay, between Misaki and Boshu. Examined.

Zu sp. Live specimen (not collected) photographed in Mallorca, Spain.

photo: Michael Makowiecki.

DOI: 10.11646/ZOOTAXA.5039.3.1

Zu sp. Live specimen (not collected) photographed in Nusa Penida, Indonesia.

photo: Helen Mitchell.

DOI: 10.11646/ZOOTAXA.5039.3.1

Zu Walters & Fitch 1960

Zu cristatus (Bonelli 1820)

Zu elongatus Heemstra & Kannemeyer 1984

Desmodema Walters & Fitch 1960

Desmodema polystictum (Ogilby 1898)

Desmodema lorum Rosenblatt & Butler 1977

Conclusions: 

Despite advances in the understanding of Trachipteridae resulting from tremendous additions to the specimen base, which have allowed for the refinement of the taxonomy and diagnoses within the family, there are still large knowl-edge gaps associated with the taxonomy of the family. These reflect incomplete understanding of geographic dis-tribution of taxa that may mask unrecognized taxonomic variability. The genus Trachipterus specifically remains problematic and will require greater detailed global study. Early life history stages remain unknown for several taxa, which hinders full interpretation of ontogenetic transitions. Protracted transitions, some of which are clarified here, further confuse stage-based diagnoses and must be considered in future analyses of this family.

Jennifer M. Martin and Eric J. Hilton. 2021. A Taxonomic Review of the Family Trachipteridae (Acanthomorpha: Lampridiformes), with An Emphasis on Taxa Distributed in the western Pacific Ocean. Zootaxa. 5039(3); 301-351. DOI: 10.11646/ZOOTAXA.5039.3.1

[PaleoOrnithology • 2021] Archaehierax sylvestris • An Exceptional Partial Skeleton of A New Basal Raptor (Accipitriformes: Accipitridae) from the late Oligocene Namba Formation, South Australia

Archaehierax sylvestris

Mather, Lee, Camens & Worthy, 2021

DOI: 10.1080/08912963.2021.1966777

 

ABSTRACT

The Australian pre-Pleistocene fossil record of Accipitridae (eagles, hawks, old-world vultures) comprises one latest Oligocene or early Miocene and one middle Miocene species, each represented by partial bones. Globally, most fossil accipitrids are based on single bones. The recent discovery of an older and considerably more complete accipitrid from late Oligocene sediments in Australia is therefore significant. It is derived from the Pinpa Local Fauna from the Namba Formation at Lake Pinpa, South Australia (~26–24 Ma). The fossil, described as Archaehierax sylvestris gen. et sp. nov., represents a raptor that was larger than the black-breasted buzzard Hamirostra melanosternon but smaller and more gracile than the wedge-tailed eagle Aquila audax. Comprehensive morphological and molecular phylogenetic analyses resolved Archaehierax as a basal accipitrid, not closely related to any living subfamily and perhaps the sister taxon to all other accipitrids exclusive of elanines. Relatively short wings similar to species of Spizaetus and Spilornis suggest it was adapted for flight within enclosed forests. Additional accipitrid fossils from the Namba Formation, a distal femur and a distal humerus, are incomparable with the holotype of A. sylvestris; they may represent distinct species or smaller individuals of the new taxon.  

KEYWORDS: Lake Pinpa, Accipitriformes, Cenozoic fossil birds, accipitrid evolution, Australia

Skeleton of an osprey by Eyton (1867) with shaded sections indicating which bones are preserved in the fossil of Archaehierax sylvestris.

 A comparison of the prepared fossil tarsometatarsus (foot bone) and a hypothesised silhouette of Archaehierax sylvestris (left) compared to the wedge-tailed eagle Aquila audax (right).

The scale bar is 10 mm long.

Systematic palaeontology

Class Aves Linnaeus, 1758

Order Accipitriformes Vieillot 1816 Family Accipitridae Vigors, 1824

Subfamily: Archaehieraxinae subfam. nov.

Type genus: Archaehierax gen. nov.

Remarks: 

The fossil is identified as an accipitrid due to the following combination of characters: Skull – Rostrum deep and narrow, with hooked tip and a large, broad nasal aperture; Tibiotarsus – Pons supratendineus ossified, aligned steeply transversely, medially placed, with unbranched canalis tendinosus, and distal condyles much wider than craniocaudally deep; Tarsometatarsus – Robust, with monosulcate hypotarsus, the lateral and medial hypotarsal crests widely separated and trochleae metatarsorum splayed both medially and laterally, and dorsally arched in distal view; Foot – Four digits with raptorial unguals, those of digits 1 and 2 relatively large; Digit IV – phalanges 2 and 3 are very short compared to phalanx 4.

The fossil can be excluded from Falconiformes (Falconidae) and the other families of Accipitriformes (Cathartidae, Sagittariidae, Pandionidae) by the morphology of the tarsometatarsal hypotarsus cristae and sulcus. The cristae are fused or partially fused together to enclose the sulcus in Cathartidae, Sagittariidae, and Pandionidae, while in Falconidae the medial crista is connected to the shaft by a ridge that extends two-thirds of its length, features that are absent in the fossil.

Diagnosis: 

Accipitrids in which the following autapomorphic features are found: the pila medialis of the sternum dorsally separates two deep pneumatic fossae, the humerus has the caput humeri only slightly elevated proximally past the tuberculum ventralis, the tip of the processus procoracoideus of the coracoid sharply curves inwards ventrally towards the medial face of the bone, the tibiotarsus has the lateral/distal retinaculum scar in a deep fossa, the tarsometatarsus is relatively elongate with narrow trochleae metatarsorum that are separated by wide incisurae, and the incisura for the m. flexor hallucis brevis tendon is large, distinct, and extends distal to the fossa metatarsi I. In addition to this, the following features occur: the rostral tip of the rostrum is hooked below the tomial margin at a relatively shallow 30–40° angle, the quadrate has a deep, distinct foramen pneumaticum caudomediale, and the sternum has the apex carinae displaced caudally from the base of the spina externa.,

Genus Archaehierax Mather, Lee, Camens and Worthy gen. nov.

 

Etymology: Archaehierax is derived from the Greek words ‘archaios’, meaning ancient, and ‘hierax’, meaning hawk. Gender masculine.

Archaehierax sylvestris Mather, Lee, Camens and Worthy gen. et sp. nov.

Etymology: The species name ‘sylvestris’ is derived from the Greek world ‘sylvas’, meaning forest, and the Latin suffix ‘-estris’, meaning ‘belonging to’.

Ellen K. Mather, Michael S. Y. Lee, Aaron B. Camens and Trevor H. Worthy. 2021. An Exceptional Partial Skeleton of A New Basal Raptor (Aves: Accipitridae) from the late Oligocene Namba Formation, South Australia. Historical Biology: An International Journal of Paleobiology. DOI: 10.1080/08912963.2021.1966777

25-million-year-old ancient eagle ruled the roost in Australia

63 bone fossil finding in desert is one of the “best preserved” eagles ever and a very rare discovery

 eurekalert.org/news-releases/929172

[Entomology • 2021] Integrative Taxonomy reveals Remarkable Diversity in Australian Protomiltogramma (Diptera: Sarcophagidae)

Protomiltogramma sp. 

Johnston, Wallman, Szpila & Pape, 2021

DOI: 10.11646/zootaxa.5043.1.1 

 twitter.com/nature_nik 

 

Abstract

Protomiltogramma Townsend is the largest and most diverse genus of miltogrammine flesh flies in Australia. However, no comprehensive taxonomic work had been completed on the Australian members of this genus in almost a century. This study presents the first taxonomic revision of all Australian species of Protomiltogramma (Sarcophagidae: Miltogramminae), completed using an integrative approach combining molecular and morphological data. Eight new species endemic to Australia are described: Protomiltogramma dalbiensis sp. n., P. grandis sp. n., P. incana sp. n., P. kapnos sp. n., P. nigrisensa sp. n., P. popularis sp. n., P. rubra sp. n. and P. subtilis sp. n. In addition, P. australis Malloch, 1930 is synonymised with P. cincta Townsend, 1916, syn. n. and P. mallochi Verves, 1987 is synonymised with P. laticeps Malloch, 1930, syn. n. Molecular phylogenetics is used to place the Australian Protomiltogramma among the miltogrammine genera of the world.

Keywords: Australia, DNA barcoding, flesh flies, Miltogramminae, phylogenetics, Diptera

 

 Nikolas P. Johnston, James F. Wallman, Krzysztof Szpila and Thomas Pape. 2021. Integrative Taxonomy reveals Remarkable Diversity in Australian Protomiltogramma (Diptera: Sarcophagidae). Zootaxa. 5043(1); 1-104. DOI: 10.11646/zootaxa.5043.1.1

  twitter.com/nature_nik/status/1442340025413169152

[Paleontology • 2022] Eptalofosuchus viridi • First Upper Cretaceous notosuchians (Crocodyliformes) from the Uberaba Formation (Bauru Group), southeastern Brazil: Enhancing Crocodyliform Diversity

 Eptalofosuchus viridi

Marinho, Martinelli, Basilici, Soares, Marconato, Ribeiro & Iori, 2022

 DOI: 10.1016/j.cretres.2021.105000 

Illustration by Júlia d'Oliveira

 twitter.com/tupandactylus 

Highlights: 

• Here we describe the first crocodyliforms fossils from the Uberaba Formation.

• The material comprises of isolated teeth and a fragmentary mandible of notosuchians.

• The isolated teeth represent Bauruchidae and a probable longisrotrine Peirosauridae.

• The fragmentary mandible was identified as a new taxon, Eptalofosuchus viridi gen et sp. nov..

Abstract

Notosuchians are the most diverse group and are frequently found in rocks of the Upper Cretaceous Bauru Group of southeastern Brazil. These crocodyliforms occupied several different terrestrial ecological niches, ranging from small to large bodied forms, including hypercarnivore to strictly herbivore animals. Most of this diversity comes from the Adamantina and Serra da Galga formations, where baurusuchids, peirosaurids and the so called “advanced notosuchians” are common occurrences. In this context, the Serra da Galga Formation (formerly Serra da Galga Member of the Marília Formation), that crops out at the Uberaba region, stands out as one of the most prolific Upper Cretaceous units in Brazil. The Uberaba Formation is another unit present in this area, underlying the Serra da Galga Formation, but to date, its crocodyliform diversity is virtually unknown. Here we describe the first notosuchians remains from the Uberaba Formation, and the first new taxon from this unit, Eptalofosuchus viridi gen. et sp. nov., based on a partial dentary with some teeth of an “advanced notosuchian”. The other remains include isolated teeth of a large baurusuchid and a possible longirostrine peirosaurid, suggesting that the Uberaba Formation shared a similar notosuchian fauna with that present in the Adamantina and São José do Rio Preto formations.

Keywords: Notosuchia, Baurusuchidae, Peirosauridae, Bauru Basin, Minas Gerais State

Archosauria Cope, 1869

Crocodylomorpha Walker, 1970 (sensu Clark, 1986)

Crocodyliformes Hay, 1930 (sensu Clark, 1986)

Mesoeucrocodylia Whetstone and Whybrow, 1983

Notosuchia Gasparini, 1971 (sensu Pol et al., 2014)

Eptalofosuchus gen. nov.

Type species: Eptalofosuchus viridi sp. nov.

Etymology. Generic name from the Greek eptá for seven and lófos for hills, in allusion to Uberaba's nickname “cidade das sete colinas” (“the city of the seven hills”), plus souchus, Greek for crocodile, leading to Latin, suchus.

Eptalofosuchus viridi sp. nov.

Etymology. Specific name derives from the Latin viridi, meaning green, in allusion to the typical greenish color of the Uberaba Formation.

 Thiago S. Marinho, Agustín G. Martinelli, Giorgio Basilici, Marcus Vinícius T. Soares, André Marconato, Luiz C.B. Ribeiro and Fabiano V. Iori. 2021. First Upper Cretaceous notosuchians (Crocodyliformes) from the Uberaba Formation (Bauru Group), southeastern Brazil: Enhancing Crocodyliform Diversity. Cretaceous Research. In Press, 105000. DOI: 10.1016/j.cretres.2021.105000

  twitter.com/tupandactylus/status/1435982854891184133

 

[Herpetology • 2021] Amolops chaochin • Taxonomic Revision of Amolops chunganensis (Pope, 1929) (Anura: Ranidae) and Description of A New Species from southwestern China, with Discussion on Amolops monticola group and Assignment of Species Groups of the Genus Amolops

Amolops chaochin Jiang, Ren, Lyu & Li, 

in Jiang, Ren, Lyu, Wang, ... et Li, 2021.

Chaochin’s Torrent Frog | 钊琴湍蛙 || DOI: 10.24272/j.issn.2095-8137.2021.107

Abstract

Amolops chunganensis is a species complex and reported widely from eastern, southern, and southwestern China. Based on molecular data of 19 populations of A. chunganensis sensu lato from China, including the population from Mt. Wuyi (type locality), we recognize A. chunganensis sensu stricto and provide an expanded description based on the topotypic specimens. Combining morphological and molecular data, we describe a new species, Amolops chaochin sp. nov., from southwestern China, which was previously identified as A. chunganensis. The new species is distinguished from all other species in the A. monticola group by: (1) moderate body size, SVL 35.3−39.2 mm in males (n=7), and 50.5−54.4 mm in females (n=7); (2) distinct tympanum, larger than half of eye diameter; (3) small tooth-like projection on anteromedial edge of mandible; (4) circummarginal groove on all fingers; (5) white tubercles on dorsal side of posterior body in both sexes; (6) distinct tubercles on dorsal thigh and white spinose tubercles on dorsal tibia in both sexes; (7) white tubercles on posterior region of tympanum in males; (8) toe webbing reaching disk by dermal fringe on inner side of toe II; (9) vomerine teeth present; (10) transverse bands on dorsal limbs; (11) external vocal sacs present in males. We further reviewed the assignment of Amolops groups, with an overall revision of membership and diagnosis of all species groups.

Keywords: Amolops chaochin sp. nov., Complex, Distribution, Amolops gerbillus, Amolops chayuensis group, Amolops spinapectoralis group

Figure  7.  General and close-up views of Amolops chaochin sp. nov. in life, showing color variation among individuals and features in amplexus
A: Adult male from Jiguanshan, Chongzhou, Chengdu, Sichuan; B–C: Adult males from Xiling Snow Mountain, Dayi, Chengdu, Sichuan; D: General view of mating pairs in amplexus in axillary amplectic positions, upper: male, lower: female; E: Close-up view of pair of developed external subgular vocal sacs in male (see arrows); F: Close-up views of male forelimbs in axillary amplectic positions.

Photos by Jin-Long Ren.

Amolops chaochin sp. nov. Jiang, Ren, Lyu, and Li

Diagnosis: According to the morphological characters of the A. monticola group stated by Stuart et al. (2010), Amolops chaochin sp. nov. is placed in the A. monticola group based on the following diagnosis: (1) skin relatively smooth; (2) dorsolateral fold distinct; (3) lateral side of head black, upper lip stripe yellowish white extending to shoulder.

Amolops chaochin sp. nov. is distinguished from all other congeners in the A. monticola group by the following combination of characters: (1) moderate body size, SVL 35.3−39.2 mm in males (n=7) and 50.5−54.4 mm in females (n=7); (2) tympanum distinct, larger than half of eye diameter; (3) small tooth-like projection on anteromedial edge of mandible; (4) circummarginal groove on all fingers; (5) white tubercles on dorsal side of posterior body in both sexes; (6) distinct tubercles on dorsal thigh and white spinose tubercles on dorsal tibia in both sexes; (7) white tubercles on posterior region of tympanum in males; (8) toe webbing reaching disk by dermal fringe on inner side of toe II; (9) vomerine teeth present; (10) transverse bands on dorsal limbs; (11) external vocal sacs present in males.

Etymology: Specific epithet “chaochin” is named after Prof. Ch’eng-Chao Liu (1900–1976) and his wife Prof. Shu-Chin Hu (1914–1992), combining the last words of their given names “Chao” and “Chin”. Prof. Liu and Prof. Hu both greatly contributed to Chinese herpetology and established the Herpetological Museum at the Chengdu Institute of Biology, Chinese Academy of Sciences. During their fieldwork in Mt. Emei, Prof. Liu and Prof. Hu found the first pair of specimens of this new species. Furthermore, based on field observations from 1938 to 1940, Prof. Liu published the detailed life history of this new species under the name “Staurois chunganensis” (Liu 1941), and the specimens collected by Prof. Liu are still preserved in CIB (Figure 8A). 

We suggest the English common name as “Chaochin’s Torrent Frog” and the Chinese common name as “钊琴湍蛙 (in Chinese Pinyin: Zhāo Qín Tuān Wā)”.

Habitat of Amolops chaochin sp. nov. at 1,179 m a.s.l. on Jiguanshan, Chongzhou, Chengdu, Sichuan, China.

Figure  9.  Habitat of Amolops chaochin sp. nov. at 1,179 m a.s.l. on Jiguanshan, Chongzhou, Chengdu, Sichuan, China
Type series were found across rocky, flowing streams (A) and adjacent pools (B, mating pair in situ on stones), ditches, and shrubs.

Photos by Jin-Long Ren.

Ke Jiang, Jin-Long Ren, Zhi-Tong Lyu, Dan Wang, Zeng Wang, Ke Lv, Jia-Wei Wu and Jia-Tang Li. 2021. Taxonomic Revision of Amolops chunganensis (Pope, 1929) (Amphibia: Anura) and Description of A New Species from southwestern China, with Discussion on Amolops monticola group and Assignment of Species Groups of the Genus Amolops. Zoological Research. 42(5); 574-591. DOI: 10.24272/j.issn.2095-8137.2021.107

[Arachnida • 2021] Taczanowskia onowoka • Phylogenetic Placement of the Spider Genus Taczanowskia (Araneae: Araneidae) and Description of A New Species from Ecuador

Taczanowskia onowoka

Jordán, Domínguez-Trujillo & Cisneros-Heredia, 2021

DOI: 10.1071/IS20084  

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Abstract

The genus Taczanowskia Keyserling, 1879 is one of the rarest groups of spiders in the orb-weaving family Araneidae, with only five species described and 17 specimens cited in publications. Our study provides new insights into the evolutionary relationships and diversity of Taczanowskia. Using morphological data, we tested the evolutionary relationships of the genus within the family Araneidae and propose the first phylogenetic hypothesis depicting the relationships among species of Taczanowskia. Our results place Taczanowskia as sister to Mastophora Holmberg, 1876, and confirm the monophyly of Taczanowskia. We describe the first species of Taczanowskia from Ecuador, collected at a Waorani community on the River Curaray basin, Amazonian lowlands of Ecuador. The new species can be easily diagnosed from all other species of Taczanowskia by having two tubercles in the opisthosoma; a distinct patchy dark–light colouration pattern with dark spots concentrated towards the anterior margin and on the lateral tips; small bundles of white setae forming a reticulum across the dorsal part of the opisthosoma, and the first two femora thick but lacking teeth on the margin.

Juan Pablo Jordán, Mariela Domínguez-Trujillo and Diego F. Cisneros-Heredia. 2021. Phylogenetic Placement of the Spider Genus Taczanowskia (Araneae: Araneidae) and Description of A New Species from Ecuador. Invertebrate Systematics. 35(7); 742-753. DOI: 10.1071/IS20084 

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[Ichthyology • 2022] Exon-capture Data and Locus Screening provide new insights into the Phylogeny of Flatfishes (Pleuronectoidei)

in Atta, Yuan, Li, ... et Tornabene, 2022.

  DOI: 10.1016/j.ympev.2021.107315

Highlights: 

• Phylogenetic analysis of flatfishes uses next-gen dataset with largest taxon sampling to date.

• Rhombosoleidae is found to be in Pleuronectoidea rather than Soleoidea.

• Positions of Poecilopsettidae and Scophthalmidae are dictated by tree-construction method.

• Many relationships in the flatfish tree are unstable due to periods of rapid evolution.

• 8/16 families need thorough analysis; 23/127 genera may not be monophyletic (21 not yet sampled).

Abstract

There is an extensive collection of literature on the taxonomy and phylogenetics of flatfishes (Pleuronectiformes) that extends over two centuries, but consensus on many of their evolutionary relationships remains elusive. Phylogenetic uncertainty stems from highly divergent results derived from morphological and genetic characters, and between various molecular datasets. Deciphering relationships is complicated by rapid diversification early in the Pleuronectiformes tree and an abundance of studies that incompletely and inconsistently sample taxa and genetic markers. We present phylogenies based on a genome-wide dataset (4,434 nuclear markers via exon-capture) and wide taxon sampling (86 species spanning 12 of 16 families) of the largest flatfish suborder (Pleuronectoidei). Nine different subsets of the data and two tree construction approaches (eighteen phylogenies in total) are remarkably consistent with other recent molecular phylogenies, and show strong support for the monophyly of all families included except Pleuronectidae. Analyses resolved a novel phylogenetic hypothesis for the family Rhombosoleidae as being within the Pleuronectoidea rather than the Soleoidea, and failed to support the subfamily Hippoglossinae as a monophyletic group. Our results were corroborated with evidence from previous phylogenetic studies to outline regions of persistent phylogenetic uncertainty and identify groups in need of further phylogenetic inference.

 

Keywords: Phylogenomics, Systematics, Soles, Flounders, Incomplete-lineage-sorting, Target-enrichment

Conclusions: 

Our analysis of flatfish systematics using an exon-capture dataset with relatively dense taxon sampling was mostly consistent with the leading phylogenetic hypotheses for the Pleuronectiformes (BHC model) and the Pleuronectidae (Vinnikov et al., 2018). We report a novel position for the family Rhombosoleidae and show extremely poor support for the subfamily Hippoglossinae. Collective inference using sixteen phylogenetic analyses demonstrates the tenuous nature of several flatfish relationships at various evolutionary scales, and how certain relationships are favored by particular methods. By examining our data within the historical context of flatfish systematics we were able to identify several regions where phylogenetic uncertainty is likely to remain and outline groups that should be targeted for further study.

 Calder J. Atta, Hao Yuan, Chenhong Li, Dahiana Arcila, Ricardo Betancur-R, Lily C. Hughes, Guillermo Ortí, Luke Tornabene. 2022. Exon-capture Data and Locus Screening provide new insights into the Phylogeny of Flatfishes (Pleuronectoidei). Molecular Phylogenetics and Evolution. 166,107315. DOI: 10.1016/j.ympev.2021.107315

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[Mollusca • 2020] Hemiplecta ligorica & H. thailandica • Reassessment and Systematic Position of the Sinistral Snails of Genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with Description of Two New Species

  

Hemiplecta ligorica & H. thailandica

Sutcharit & Panha, 

in Sutcharit, Jeratthitikul, Tongkerd & Panha, 2021.

DOI: 10.1163/18759866-BJA10016 

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Abstract

Indochina land snails of the family Ariophantidae are in need of thorough systematic revision. Here we comprehensively revise the systematics of the large-shelled, sinistral (counterclockwise) coiling snails from Thailand and Peninsular Malaysia. Molecular phylogeny based on mitochondrial (coi and 16S) and nuclear (28S) gene sequences demonstrates that these sinistral snails are not members of Dyakiidae as previously thought, but instead are more closely related to the genus Hemiplecta in the family Ariophantidae. Comparative morphology also reveals similarity of reproductive organ features (globular gametolytic organ, well-developed dart apparatus, and lack of amatorial organ complex). Based on this evidence, we propose to transfer these sinistral snails to the genus Hemiplecta. Molecular phylogenetic analyses further strongly support the monophyly of this sinistral lineage with respect to other members of Hemiplecta. This monophyletic clade consists of five members including three species that were previously classified as “Dyakia”, H. lahatensis, H. retrorsa and H. salangana, and two new species described herein, Hemiplecta ligorica n. sp. and H. thailandica n. sp. This study also suggests that the anatomy of the gametolytic organ in the genus Hemiplecta corresponds well with the phylogenetic relationships and appears to be a taxonomically informative character, while the penial verge has little utility for generic recognition.

Keywords: Pulmonata; Dyakiidae; sinistral; endemic species; Indochina

Family Ariophantidae Godwin-Austen, 1888

Genus Hemiplecta Albers, 1850

1. Hemiplecta retrorsa (Gould, 1843)

2. Hemiplecta salangana (Martens, 1883)

3. Hemiplecta lahatensis (Morgan, 1885)

Shell characters.
A. Hemiplecta lahatensis, specimen cumz 5259/2.
B, C, Hemiplecta thailandica n. sp., (B) holotype cumz 5095/1 and (C) specimen cumz 5098 from Chanthaburi Province.
D, E. Hemiplecta ligorica n. sp., (D) holotype cumz 5093/1 and (E) paratype cumz 5087 from the type locality.

4. Hemiplecta thailandica Sutcharit and Panha, n. sp.

Etymology. The species name “thailandica” refers to the type locality of this new species in Chanthaburi Province, Thailand.

Diagnosis. Large and low conic shell with brown to brownish yellow shell color, rounded last whorl with narrow dark brown spiral band on periphery. Penial sculpture with small penial papillae arranged over nearly entire penis length.

 

5. Hemiplecta ligorica Sutcharit and Panha, n. sp.

Etymology. For the historical name of Nakhon Si Thammarat Province, where the type locality is situated.

Diagnosis. Small, sinistral helicoild shell with whitish color, rounded last whorl with dark brown to brownish spiral band on periphery and upper shell surface. Penial sculpture with small papillae arranged over about half of penis length.

Conclusion: 

Based on phylogenetic results and morphological information in the present study, we have transferred the sinistral species previously and incorrectly assigned to Dyakia (family Dyakiidae) to the genus Hemiplecta (family Ariophantidae). Two previously unrecognised species are described based on consistent differentiation in molecular, shell, and genitalia characters. Our data also provide further support for three other sinistral Hemiplecta species, which are also re-described herein. The results also suggest the synonymization of the formerly recognized as (sub)genus Koratia under the Hemiplecta. Finally, the results indicate the evolutionary instability of shell traits that are often used for land snail classification, while genital characters are highlighted as reliable taxonomic markers for delimiting species and at least some higher taxa. The integration of multiple independent characters including molecular evidence is crucial for delimiting higher systematic levels.

  Chirasak Sutcharit, Ekgachai Jeratthitikul, Piyoros Tongkerd and Somsak Panha. 2021. Reassessment and Systematic Position of the Sinistral Snails of Genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with Description of Two New Species. Contributions to Zoology. 90(2); 183–215. 

DOI: 10.1163/18759866-BJA10016

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[Herpetology • 2021] Duttaphrynus brevirostris, D. peninsularis & D. stomaticus • Lost, Forgotten, and Overlooked: Systematic Reassessment of Two lesser-known Toad Species (Anura, Bufonidae) from Peninsular India and Another Wide-ranging northern Species

A. Duttaphrynus brevirostris (BNHS 6126) from Kempholey Ghat region in Sakleshpur taluk. B. Duttaphrynus peninsularis (SDBDU 6370) from Wattakolli.
C–D. Duttaphrynus stomaticus: C. SDBDU 2015.2909 from Assam; D. SDBDU 2012.2170 from Rajasthan.

in Bisht, Garg, ... et , 2021. 

DOI: 10.3897/zse.97.61770

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Abstract

We rediscovered two species of toads, Bufo stomaticus peninsularis and Bufo brevirostris, which were described from Peninsular India 84 and 101 years ago, respectively, but have not been reported since. Because the name-bearing types of both species are either damaged or lost, we provide detailed redescriptions, morphological comparisons, and insights into phylogenetic relationships with closely related members of the genus Duttaphrynus sensu lato, based on new material from the type locality of each species. We clarify and validate the identity of D. brevirostris, which was rediscovered from multiple localities in the Malenadu and adjoining coastal regions of Karnataka. We also demonstrate that Bufo stomaticus peninsularis, which was considered a synonym of Duttaphrynus scaber, is a distinct species. Bufo stomaticus peninsularis differs from Duttaphrynus scaber morphologically and genetically, and is more closely related to members of the Duttaphrynus stomaticus group. We also clarify the identity of the namesake species of the Duttaphrynus stomaticus group, which is reported widely in India and neighbouring countries, but lacks sufficient taxonomic information due to its brief original description and reportedly untraceable type material. We located and studied the complete syntype series of D. stomaticus, probably for the first time in over a century, and we report on the status of available specimens, provide detailed description of a potential type, compare it to related species, and clarify the species’ geographical range. Our molecular analyses suggest that D. stomaticus is minimally divergent from, and possibly conspecific with, D. olivaceus. Our analyses also clarify its relationship to the closely-related D. peninsularis comb. nov., with which it was previously confused. Finally, our study provides other insights into the phylogenetic relationships and genetic differentiation among various species of Duttaphrynus toads.

Key Words: Amphibia, Bufo stomaticus peninsularis, distribution, Duttaphrynus brevirostris, Duttaphrynus stomaticus group, Firouzophrynus, molecular phylogeny, redescription, rediscovery, taxonomy

Topotype of Duttaphrynus brevirostris (Rao, 1937), topotype of D. peninsularis (Rao, 1920), and referred specimens of D. stomaticus (Lütken, 1864) in life.
A. Duttaphrynus brevirostris (BNHS 6126) from Kempholey Ghat region in Sakleshpur taluk.
B. Duttaphrynus peninsularis (SDBDU 6370) from Wattakolli.
C–F. Duttaphrynus stomaticus: C. SDBDU 2015.2909 from Assam; D. SDBDU 2012.2170 from Rajasthan; E. SDBDU 2012.2172 from Delhi; and F. SDBDU 2012.2268 from Bihar.

Phylogenetic relationships and genetic differentiation in the genus Duttaphrynus.
 A. Maximum Likelihood phylogenetic tree based on 5,737 bp DNA comprising nine mitochondrial gene regions and two nuclear genes, showing phylogenetic relationships between the major species-level lineages. Values above and below the branches indicate Bayesian Posterior Probabilities (BPP) and RAxML Bootstrap Support (BS), respectively;
B. Maximum Likelihood barcoding tree based on 524 bp of the mitochondrial 16S rRNA sequences. BPP and BS support values are indicated above and below the branches, respectively. Coloured vertical bars outside the terminal node labels indicate putative species delimited in the bPTP analysis;
C. Median-Joining haplotype network based on 42 haplotypes recovered from 133 sequences of the 16S gene (420 bp). Size of the coloured circles is proportional to the number of haplotypes; black circles indicate median vectors; each branch represents a single mutation step; additional mutational steps are indicated by values in parentheses; photo credits: D. crocus (Guinevere O. U. Wogan), D. olivaceus (Parham Beyhaghi), and D. dhufarensis (Todd W. Pierson).

Duttaphrynus brevirostris (Rao, 1937)

Duttaphrynus peninsularis (Rao, 1920), comb. nov.

Duttaphrynus stomaticus (Lütken, 1864)

Geographical distribution of Duttaphrynus brevirostris (dark grey), D. peninsularis (blue), and D. stomaticus (orange).

Conclusions: 

The results of this study resolve long-standing uncertainty regarding the identities and taxonomic status of two toad species described from Peninsular India. Bufo brevirostris Rao, 1937 was considered a problematic taxon, because its original name-bearing types are lost. Bufo stomaticus peninsularis Rao, 1920 was long forgotten as an available name for Peninsular Indian populations closely related to Duttaphrynus stomaticus. We substantiate D. peninsularis to be a distinct species, which is both morphologically diagnosable and phylogenetically distinct. Taxonomic redefinition of both of these species was achieved not just by examining the original literature and available types, but also through an effort to rediscover new material from each species’ respective type locality. The redescription of Bufo brevirostris Rao, 1937 based on new topotypic material, along with detailed comparisons to related taxa, objectively clarifies its identification for future reference. Similarly, topotypic material for Bufo stomaticus peninsularis Rao, 1920 enabled a detailed re-evaluation of its taxonomic status in the absence of a well-preserved type. Altogether, our results emphasise that new collections from type localities of historically available names should be attempted when taxonomic resolution is not feasible on the basis of original descriptions or type specimens (Bailey 1933; Garg and Biju 2016).

The present work clarified the taxonomic identity of another species, Duttaphrynus stomaticus, which was overlooked due to its presumed wide distribution. This taxon was known only from its brief original description, and the available, original name-bearing types remained unexamined due to literature-based misconceptions concerning their untraceability (Dutta 1997; Ganesh et al. 2020). We located the well-preserved eight original type specimens, and clarified the status of name-bearing types and the identity of this species, which we redescribed to facilitate future taxonomic studies. This action also aided our objective of resolving the taxonomic status of D. peninsularis, which was originally defined as a variety of D. stomaticus. Our results have important implications concerning the taxonomy and geographical ranges of the two species. Hereafter, D. stomaticus should be considered as a species found in the northern regions of South Asia, whereas its sister taxon D. peninsularis should be recognised as a Peninsular Indian form (Fig. 4; Suppl. materal 1: Table S3). Detailed redescriptions provided in this study will enable proper identification and range delineation, and serve as the basis for future conservation action. Knowledge of phenotypic variation and phylogenetic affinities of both species will also facilitate a better understanding of patterns of genetic differentiation within the genus, particularly among the species of the Duttaphrynus stomaticus group.

   

 Karan Bisht, Sonali Garg, A. N. D. Akalabya Sarmah, Saibal Sengupta and S. D. Biju. 2021. Lost, Forgotten, and Overlooked: Systematic Reassessment of Two lesser-known Toad Species (Anura, Bufonidae) from Peninsular India and Another Wide-ranging northern Species. Zoosystematics and Evolution. 97(2): 451-470. DOI: 10.3897/zse.97.61770

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